49640388869 has 16 divisors (see below), whose sum is σ = 50489921664. Its totient is φ = 48798676800.

The previous prime is 49640388827. The next prime is 49640388881. The reversal of 49640388869 is 96888304694.

It is a cyclic number.

It is not a de Polignac number, because 49640388869 - 2¹⁶ = 49640323333 is a prime.

It is a super-2 number, since 2×49640388869² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49640328869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23184539 + ... + 23186679.

It is an arithmetic number, because the mean of its divisors is an integer number (3155620104).

Almost surely, 2^49640388869 is an apocalyptic number.

It is an amenable number.

49640388869 is a deficient number, since it is larger than the sum of its proper divisors (849532795).

49640388869 is a wasteful number, since it uses less digits than its factorization.

49640388869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3788.

The product of its (nonzero) digits is 71663616, while the sum is 65.

The spelling of 49640388869 in words is "forty-nine billion, six hundred forty million, three hundred eighty-eight thousand, eight hundred sixty-nine".